New United boss Louis van Gaal had been expected to table an offer for the Chile international -- but no official approach has yet been forthcoming despite reports suggesting a club-record 47 million-pound offer.

Vidal, 27, first identified as a target by former Old Trafford manager David Moyes, underwent knee surgery in May.

Juventus manager Massimiliano Allegri -- who sat out his club's recent friendly against an Indonesia Super League XI -- has expressed confidence that Vidal would stay in Serie A.

Sporting director Giuseppe Marotta has said he would have to ask for a move in order for the club to allow him to leave.

Van Gaal has already brought in one central midfielder, signing Ander Herrera from Athletic Bilbao for 28 million pounds.

PREMIER LEAGUE PREVIEWS

As we count down to kickoff on Aug. 16, ESPN FC previews all 20 teams in this season's competition. Can Burnley, QPR and Leicester stay up? Will the new signings of Alexis Sanchez, Diego Costa and Adam Lallana help usurp Man City's crown? Will Manchester United get back on track under Louis van Gaal?